OpenAI unveils GPT-5.1 with ‘Instant’ and ‘Thinking’ variants for a more engaging ChatGPT experience

OpenAI has unveiled GPT-5.1, its latest flagship model, introducing two new intelligent modes — GPT-5.1 Instant and GPT-5.1 ...
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ChatGPT 5.1 Rolling Out Now, But You May Not Be Able To Access Unless...

OpenAI says its new model, GPT-5.1, is much better at math and coding tests like AIME 2025 and Codeforces. It can explain ...